It depends on how you're counting, which gets a bit messy with the different arcs and publications. The first part, which ran in 'Weekly Shonen Jump,' wrapped up at Chapter 97. That's the complete Public Safety Saga. After that, Part 2 started serialization in 'Shonen Jump+' online. As of early 2024, Part 2 was still ongoing. I checked my usual tracking sites recently, and the count was up to around Chapter 157 or 158. So the total, combining both parts, is hovering right around that 157-158 mark.
But that number is a moving target since new chapters drop pretty regularly. If you're looking to binge-read, most official apps like Viz Media or Manga Plus will have the definitive, up-to-date count. They bundle the parts together in one continuous chapter list, which is super helpful. Just be aware that the tone and pacing shift noticeably in Part 2—it feels like a different beast sometimes, which I actually appreciate.
The chapter structure itself is pretty lean; Fujimoto isn't one for overly long, dragging arcs. Some chapters fly by in what feels like minutes, which keeps the chaos level high but can make the wait for the next one brutal.